<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        #myCanvas{
            margin-top: 20px;
            display: block;
        }
    </style>
</head>
<body>
    <canvas id="myCanvas" width="200" height="100">hahah</canvas>
    <object data="./test.html" type=""></object>
</body>
</html>
<script type="text/javascript">
    var c=document.getElementById("myCanvas");
    var cxt=c.getContext("2d");
    cxt.moveTo(0,0);
    cxt.lineTo(100,0);
    cxt.lineTo(100,50);
    cxt.lineTo(0,0);
    cxt.stroke();
    let obj={"name":"xixi","age":18}
    console.log(Object.keys(obj))
    </script>
